Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passivieren, passiver
passiveeeren » passiveeeeren, massiveeeren, passivereeeren, passivieren, passieren
massiven » massive, massively, massiv
massiveren » massivere, massigeren, massivement

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (passiv OR ((passiven OR massiven) OR (massiveren OR (passiverer OR passiveeeren)))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiven or massiven) or (massiveren or (passiverer or passiveeeren))))*.